Starting-crank.



ITO- 842,798.

PATENTBD JANJ29; 1907. e. M. D. MBRWIN.

STARTING CRANK.

APPLICATION FILED DBO. 5. 1905.

2 SHEETS-SHEET 1.

IIIIIII 9k 4:. 81;. 244 A0, 244mm v 441. wdnz m No. 842.793. PATENTED JAN. 29, 1907.

G. M. 1). MERWIN.

STARTING CRANK.

APPLICATION FILED DEG-5. 1905.

2 SHEETS-SHEET 2.

' vided With-the handle 9, rig'ldlysecured at its inner end to. the outerface of the mem- 7 In the drawings, Figure 1 is aper ti' UNITED sTA'r s PATENT oEEIoE.

GEORGE M- D; MERWIN, oEsTj- Loms, MISSOURI.

STARTING-CRANK.

five. s42,79s.

Specification of Letters Patent.

Patented Jan. 29, 1907.

Application filed December 6, 1905. Serial No. 290,470,

- I To all whont it may concern:

Be it known that I, GEORGE M. D. MER- WIN, a citizen of the United statespand a resident of St. Louis, Missouri, have invented certain new and useful Improvements in "Starting-Cranks, of which the following is a specification! My invention relates to improvements in starting-cranks, andhas for its object to provide. acrank susceptible of being carried 'only in one direction.

view of the device of my invention applied to an automobi1e motor. Fig.2 isan enlarged perspective view of the device of my invention. ..Fig.' 3 is an enlarged vertical View in mid-section of the same. verse vertical sectionof the ratchet and spring-pawLemployed in my invention, bee ing taken on the line 4 40f Fig. 7. Fig. '5 is a transverse ,v'erticalview 'in' midfsection, taken on the, line 44 of Fig.

lan view of the inner faceof the outer memberemployedinmy inventiong; Fig. 7 isa side elevation of thedevice of my invention. My invention is designed to overcomeyt-he 4" isa transacoidental backward movement of the starting-crank used in automobile-motors and the like, The backwardmovement ofthe starting axle ofsuch motors is frequentl' occasioned by premature sparking and, t e like,

'and such backward movement, when carry- -ing the 'startingrcrank with it, is a frequent cause'of injuryfto the handof the operator. To this-end I have provided the crank8, prober 10, which. is cylindrical in. section. The

inner-face of the member 10- is ratcheted, as

' the outer face of. the member '12, The mom i I c [a ly greater than the thickness of the memindibated in the drawingsby the numeral 11', to occlude theoorresponding depressions on ber 12 is of a diameter corresponding to that of the member and is ratcheted uponitsperiphery, as indicated by the numeral '13, to

engage with" the spring-pawl 14, which is mounted on the member 15. i The pinj16 is lindri'cal in formand of a length considerbers 10 and 12. "The member 10 is rigidlyand concentrically. mounted uponthe pm 16, and-themember 12 is loosely and'axlally mounted upon the said pin '16. The inner face of'the' member 12 is recessed, as 111K117- cated by the numeral 17, and across-pin 18 extends radially through the pin 16 at a I thrust into shaft 19 then throws the 7. Fig. dis a .eted periphery, a spring-lpawl pen point just beyond the inner face of the.mem-' ber 12. The startingeshaft 19 is ratcheted upon two of its sides, asindicated by the numeral 20, and is provided with a-bore21, into which the inner end of the pin 16 is thrust when thest'artingmrank isin use. When pin 16 has thus been the inner end of the place, the occluding ratcheted faces of the members .10 and 12 are in contact, and the cross-pin 18 engaging with the the starting-shaft to beratchets 20 causes revolved in the desired direction to start the starting' shaft of a, motor apertured to receive a crank-pin, a crank by which the crank-pin its caused to. revolve and to drive the starting shaft in the redetermined di- 'motor; In the event offa backward acci-, dental movement of the starting-shaft 19. the spring-pawl 14 engages with one of the- (indi'cated by 13,) causingthe memrection; the-remainder; o the mechanism providing means whereby when the startingshaft. itself is caused to a direction 0 posite to they desired and pre-' determined ireotionby any accidentalcir cumstances the crank -pin willbecome disengaged from the aperture in the .starting'- shaft;-'so-that the crank willnot be carried backward by the backward-revolution of the starting-shaft.

I-lavingthus describedmy invention, what claimia's new, and desire to havesecured to .me by the grant'of Letters Patent, is

1. In adevice 'ofthe class described, av crank, a-pin carried-by the crank, an outer member mounted on the pin and having a; ratcheted innerface, an inner member loosely rotate backwardly in' mounted on the *pin' and having a ratcheted outer face, a recessed inner. face and 'aratchadapted to engage with said'ratchete hery, 'a-starting-shaft adapted to receive t e inner end of the pin and ratcheted on'its outer face, and

a cross-pin mounted radially throirghf-the former-named pin and adapted to? engage withthe outer ratcheted face of'the startingvolved .in the opposite directi'cn, substan- I adapted to engage-with the ratche-tedf'aceof.

latter, and means also earriedgby saidbin for '-'ing-'shaft' toelfect forward rotation ofet he shaftand to be seated in the recess in the inner face of the said inner member, substantially as described.

2. In a device of the class described, a starting-shaft, a crank, 21. pin actuated by the cranlgand means whereby the shaft is engagedwith and actuated by the pin When the crank is revolved in the predetermined direcst-a1ting sl1aft having a bore and provided tion, and means whereby the pin. isdisem" gaged from the shaft when the shaft is retially as described. I

3. In a device-of the class described, a motor, a starting-shaft l provided with a bore '21, a crank, a slidable pifi carried! by said crank and adapted to belnserted iii'the bore in the starting-crank, a coll'ar ,fixed. to' the pin and having a'ratchetedinnerface, a member 12 loosely mounted upon 'the-pin and ratcheted to engage with the first} namedcollarmeniber, the member 12 being ratcheted'about its periphery, a-spring-pawl the member 12, a cross-pin mounted in the firstnamed pin and adapted to engage with depressions 1n thego'uter, face of the startingshaft, the member being provided'with a stantially as described. r I

4. In a device ofithe ciassideseribed, .a. starting-shaft having a. bore and provided With a'ratchetedface; a crank, a in carried. by said crank and arranged in ,t' ebo're of said shaft,said pin being movable axially ofv said bore, means carriedby said pinfor en,- gagement withfthe ratchet'edface bf'thes tarting-shaft to effect-forward rotationof the freeing the 1 first mentioned in'eans from. en-j gagement with the shaft when the latter r0 tates in a reverse direction. p j V 5. In a device oft'liel-class. described, a starting-shaft having. a bore; and provided with a ratcheted-face, acrank,;a .pincarried by said crank and arrangedin the,;bc r'e,of

said shaft, said pin being movable airially of said bore, means carried by said for engagement with the ratcheted face of the startlatter, a pair of membersalso carried said "ingsh'af-t, onefof said members being fixed and the other movable, the-opposing faces of :said members liaving'eng'aging surfaces de-' 'upon reverse rotation of the starting-shaft, and means for locking said loose-member against reverse rotation.

6.-I'n'a device of theclass described; a

with a ratcheted face, a crank, apin: carried by saicbcrar'rkand arranged in the bore of said tionedpinforengagement with the ratcheted face ofthe startin'g shaft to effect forward rotation of the latter, a pair-0f niembers also carriedwby saidfirst-rnentioned pin and arranged intermediatezthe crank and the cross. pin,one' of said members being fixed and; the

[other movable, the opposing faces of saidmembers having engaging surfaces designed to effect axlal movement of said pin upon reverse rotationi 7. A device of the-class described, comprising a crank, a pin'c'a'rried thereby, means carried by said pin for engaging the startingsha'ft of-a in'ot'o'r to'effe'ct'forward rotation of- .said shaft, and-meansalso-carriedby: said pin, for -freeing th'first-menticined means from engagement with the starting-shaft "when the lattenrotate'sin a reverseidirection.

' 8; ,A devicefof'the class described, com

prising. a crank, a pin carried thereby, acrossgaging the starting-shaft of a motor to effect forward I rotation-of 'saidshaft, a collar fmonnted onsaid first-mentioned .pin' and movableaxially thereof, and asecond collar :mOv'e nent bherom. the opposingv facesof: {said cbllars' having" engag ng surfaces 1 de Inpon'reverserotation of the starting'shaft.

1 Witnesses:

intermediate the crank and the means: for engaging the ratcheted faceof'the start 1 r'everse rotation" of the startingTshaf-t, and

means-for locklng loose member against 7 also maimed onisaid' but" fixed against a signed to effect axial movement of said shaft, saidpin being movable axiallyof-said bore, a cross-pin carried by the .firsternen pin carriedby the first ment i0ned pinfor en- I 9,5- signed to effect ax al qveme t ofsaid pm In testimony whereof have sig ned my;- 

